Posted: Tue Aug 08, 2006 10:51 pm
These days, all that "specialized" equipment can consist of nothing but a PC with the right software with a transciever by its side - that's all the hams use to do the same transmission modes. So I'd imagine that the business band packet radio transmissions I heard can be decoded by a PC running the right software. Besides, I don't know if the packets I heard were actually the ones that set off the siren or if they had nothing to do with the activation at all. I didn't hear any before the siren started for the second round of testing.Elliott wrote:Most likely not. The data packets heard are probably FSK (Frequency Shift Keying), which requires specialized equipment to interact with. It is an actual security measure, to prevent "manipulation". This is an improvement over DTMF (keypad tones), which was capable of "manipulation".Midwest Siren wrote:So if you can figure out what the frequency is is there a possible way to manipulate that frequency? Im just asking I don't plan on doing anything.